apprehensive

worried or frightened that something unpleasant may happenan apprehensive face/glance/lookThe long delay had made me quite apprehensive.apprehensive about/of somethingI was a little apprehensive about the effects of what I had said.You have no reason to be apprehensive of the future.apprehensive that…She was deeply apprehensive that something might go wrong.See related entries:FearWord Originlate Middle English (in the sense relating to perception or understanding): from Frenchappréhensif or medieval Latinapprehensivus, from Latinapprehendere